River ID

South Fork Sun River

Idaho • 47.5164, -112.9174

Hydrography profile Updated Feb 1, 2026

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

27 mi

43 km

Elevation

7,674′ → 4,735′

2,939 ft drop

Stream Order

Medium River

Slope

2.09%

110.2 ft/mi

Drainage

248 mi²

642 km²

Avg Flow

-- cfs

1.1 mph velocity

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

Loading the interactive map…

Data from USGS & NOAA for informational purposes only. Read source and safety notes

Rain Radar